To oil a car, you need to change the engine oil regularly. The primary purpose of motor oil is to lubricate all of the moving metal pieces inside the engine of your car, truck, or SUV. Motor oil ensures that the pistons, valves, camshaft, and other components travel or turn smoothly while simultaneously minimizing friction and reducing component wear. The result is longer engine life and fewer mechanical breakdowns. Motor oil also aids your engine’s cooling system by helping to transfer heat. As it circulates through your engine, the oil picks up heat before traveling back to the oil pan where it is stored. To change the oil, you need to jack up the car, unplug the oil pan, remove the old filter, replace the drain plug, install the new filter, and fill the engine with the recommended amount of oil. You should refer to the technical specifications or service section of your owner’s manual to determine what kind of oil you should use or how often you should change it.